Performing motion vector prediction for video coding

An apparatus for encoding video data, the apparatus comprising:

• means for determining spatial candidate motion vectors associated with current portion of a current video frame, wherein the spatial candidate motion vectors comprise motion vectors determined for neighboring portions for the current video frame adjacent to the current portion, wherein the means for determining the spatial candidate motion vector comprises means for pruning only the spatial candidate motion vectors to remove duplicate ones of the spatial candidate motion vectors;
• means for determining a temporal candidate motion vector associated with the current portion of the current video frame, wherein the temporal candidate motion vector comprises a motion vector determined for a portion of a reference video frame, wherein the determined temporal candidate motion vector is a duplicate of one of the spatial candidate motion vectors, and wherein the spatial candidate motion vectors and the determined temporal candidate motion vectors each comprises a vertical component and a horizontal component;
• means for selecting the temporal candidate motion vector or one of the spatial candidate motion vectors remaining after pruning as a selected candidate motion vector for a motion vector prediction process;
• and
• means for signaling the selected candidate motion vector in a bitstream.

An apparatus for encoding video data, the apparatus comprising:

• a memory configured to store the video data comprising a current portion of a current video frame;
• and
• one or more processors comprising a video encoder configured to:
• determine spatial candidate motion vectors associated with the current portion of the current video frame by, at least in part, pruning only the spatial candidate motion vectors to remove duplicate ones of the spatial candidate motion vectors without considering the temporal candidate motion vector during the pruning process, wherein the spatial candidate motion vectors comprise motion vectors determined for neighboring portions for the current video frame adjacent to the current portion, determines a temporal candidate motion vector associated with the current portion of the current video frame, wherein the temporal candidate motion vector comprises a motion vector determined for a portion of a reference video frame, and wherein the determined temporal candidate motion vector is a duplicate of one of the spatial candidate motion vectors, and wherein the spatial candidate motion vectors and the determined temporal candidate motion vectors each comprises a vertical component and a horizontal component, and selects the temporal candidate motion vector or one of the spatial candidate motion vectors remaining after pruning as a selected candidate motion vector for a motion vector prediction process, and signals the selected candidate motion vector in a video bitstream.

A non-transitory computer-readable medium comprising instructions that, when executed, cause one or more processors to:

• determine spatial candidate motion vectors associated with current portion of a current video frame by, at least in part, pruning only the spatial candidate motion vectors to remove duplicate ones of the spatial candidate motion vectors without considering the temporal candidate motion vector during the pruning process, wherein the spatial candidate motion vectors comprise motion vectors determined for neighboring portions of the current video frame adjacent to the current portion;
• determine a temporal candidate motion vector associated with the current portion of the current video frame, wherein the temporal candidate motion vector comprises a motion vector determined for a portion of a reference video frame, and wherein the determined temporal candidate motion vector is a duplicate of one of the spatial candidate motion vectors, and wherein the spatial candidate motion vectors and the determined temporal candidate motion vectors each comprises a vertical component and a horizontal component;
• select the temporal candidate motion vector or one of the spatial candidate motion vectors remaining after pruning as a selected candidate motion vector for a motion vector prediction process;
• and
• signal the selected candidate motion vector in a bitstream.

A method of decoding video data, the method comprising:

• determining spatial candidate motion vectors associated with a current portion of a current video frame, wherein the spatial candidate motion vectors comprise neighbor motion vectors determined for spatially neighboring portions adjacent to the current portion within the current video frame, and wherein determining the spatial candidate motion vector comprises pruning only the spatial candidate motion vectors to remove duplicate ones of the spatial candidate motion vectors;
• selecting a temporal candidate motion vector or one of the spatial candidate motion vectors remaining after pruning as a selected candidate motion vector for a motion vector prediction process based on a motion vector predictor (MVP) index signaled in a bitstream, wherein the temporal candidate motion vector comprises a motion vector determined for a portion of a reference video frame, and wherein the temporal candidate motion vector is a duplicate of one of the spatial candidate motion vectors, and wherein the spatial candidate motion vectors and the determined temporal candidate motion vectors each comprises a vertical component and a horizontal component;
• and
• performing motion compensation based on the selected candidate motion vector to predict the current portion of the current video frame;
• and
• decoding the current portion of the current video frame based on the predicted current portion.

An apparatus for decoding video data, the apparatus comprising:

• means for determining spatial candidate motion vectors associated with a current portion of a current video frame, wherein the spatial candidate motion vectors comprise motion vectors determined for neighboring portions of the current video frame adjacent to the current portion, wherein the means for determining the spatial candidate motion vector comprises means for pruning only the spatial candidate motion vectors to remove duplicate ones of the spatial candidate motion vectors;
• means for selecting one of a temporal candidate motion vector or one of the spatial candidate motion vectors remaining after pruning as a selected candidate motion vector for a motion vector prediction process based on a motion vector predictor (MVP) index signaled in a bitstream, wherein the temporal candidate motion vector comprises a motion vector determined for a portion of a reference video frame, and wherein the temporal candidate motion vector is a duplicate of one of the spatial candidate motion vectors, and wherein the spatial candidate motion vectors and the determined temporal candidate motion vectors each comprises a vertical component and a horizontal component;
• and
• means for performing motion compensation based on the selected candidate motion vector to predict the current portion of the current video frame;
• and
• means for decoding the current portion of the current video frame based on the predicted current portion.

An apparatus for decoding video data, the apparatus comprising:

• a memory configured to store the video data comprising a current portion of a current video frame;
• and
• one or more processors comprising a video decoder configured to:
• determine spatial candidate motion vectors associated with the current portion of the current video frame by, at least in part, pruning only the spatial candidate motion vectors to remove duplicate ones of the spatial candidate motion vectors without considering the temporal candidate motion vector during the pruning process, wherein the spatial candidate motion vectors comprise neighbor motion vectors determined for neighboring portions adjacent to the current portion;
• select one of a temporal candidate motion vector or one of the spatial candidate motion vectors remaining after pruning as a selected candidate motion vector for a motion vector prediction process based on a motion vector predictor (MVP) index signaled in a bitstream, wherein the temporal candidate motion vector comprises a motion vector determined for a portion of a reference video frame, and wherein the temporal candidate motion vector is a duplicate of one of the spatial candidate motion vectors, and wherein the spatial candidate motion vectors and the determined temporal candidate motion vectors each comprises a vertical component and a horizontal component;
• perform motion compensation based on the selected candidate motion vector to predict the current portion of the current video frame;
• and
• decode the current portion of the current video frame based on the predicted current portion.

A non-transitory computer-readable medium comprising instructions that, when executed, cause one or more processors to:

• determine spatial candidate motion vectors associated with a current portion of a current video frame by, at least in part, pruning only the spatial candidate motion vectors to remove duplicate ones of the spatial candidate motion vectors without considering the temporal candidate motion vector during the pruning process, wherein the spatial candidate motion vectors comprise motion vectors determined for neighboring portions of the current video frame adjacent to the current portion;
• select one of a temporal candidate motion vector or one of the spatial candidate motion vectors remaining after pruning as a selected candidate motion vector for a motion vector prediction process based on a motion vector predictor (MVP) index signaled in a bitstream, wherein the temporal candidate motion vector comprises a motion vector determined for a portion of a reference video frame, and wherein the temporal candidate motion vector is a duplicate of one of the spatial candidate motion vectors, and wherein the spatial candidate motion vectors and the determined temporal candidate motion vectors each comprises a vertical component and a horizontal component;
• perform motion compensation based on the selected candidate motion vector to predict the current portion of the current video frame;
• and
• decode the current portion of the current video frame based on the predicted current portion.